Here are some examples of Oracle alter table syntax to modify data columns and note that you can add constraints like NOT NULL: ALTER TABLE customer MODIFY (cust_name varchar2(100) not null, cust_hair_color varchar2(20)) ;
Did Sir Isaac Newton write any books? His best known book is Principia (Philosophiae Naturalis Principia Mathematica) published in 1687; which includes his laws of motion. Edit
Sir Isaac Newton: all this and more! Dorling Kindersley/The Agency Collection/Getty Images You may know Sir Isaac Newton (1642-1727) as that apples-and-gravity guy, but the inscription on his tomb at Westminster Abbey hints at far greater wonders. According to the carved Latin script, interred within are not merely the bones of a great man, but the bones of the greatest man who ever lived.